Best Steam Includes Source SDK Games

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Name Release Date Current Players All-Time Peak Rating
Counter-Strike: Source Counter-Strike: Source 1 Nov, 2004 40 240 100 056 95.06
Left 4 Dead 2 Left 4 Dead 2 16 Nov, 2009 25 410 162 399 96.78
Garry's Mod Garry's Mod 29 Nov, 2006 25 347 73 863 96.10
Half-Life 2 Half-Life 2 16 Nov, 2004 1 981 64 085 96.46
Black Mesa Black Mesa 6 Mar, 2020 1 247 7 158 93.89
No More Room in Hell No More Room in Hell 31 Oct, 2013 741 10 922 88.54
Portal Portal 10 Oct, 2007 502 20 672 97.20
Left 4 Dead Left 4 Dead 17 Nov, 2008 468 30 616 94.66
Alien Swarm: Reactive Drop Alien Swarm: Reactive Drop 20 Apr, 2017 383 9 335 92.73
ERA ONE ERA ONE 30 Sep, 2024 270 934
Day of Defeat: Source Day of Defeat: Source 12 Jul, 2010 220 7 507 89.63
Menace from the Deep Menace from the Deep 2024 164 1 653 81.15
Half-Life 2: Deathmatch Half-Life 2: Deathmatch 1 Nov, 2004 158 2 702 88.39
Entropy : Zero 2 Entropy : Zero 2 20 Aug, 2022 155 3 751
Pool Nation FX Lite Pool Nation FX Lite 7 Dec, 2015 104 1 271 70.39
Fistful of Frags Fistful of Frags 9 May, 2014 91 3 537 89.61
Synergy Synergy 3 Oct, 2008 90 2 940 88.30
Astro Colony Astro Colony 7 Nov, 2022 76 2 751 79.07
Empires Mod Empires Mod 28 Jul, 2008 53 126 82.05
Kreedz Climbing Kreedz Climbing 15 Jun, 2017 52 379 78.17
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